[go: up one dir, main page]

WO2023050025A1 - Sélection de porteuse pour des messages d'accès aléatoire de liaison descendante - Google Patents

Sélection de porteuse pour des messages d'accès aléatoire de liaison descendante Download PDF

Info

Publication number
WO2023050025A1
WO2023050025A1 PCT/CN2021/121148 CN2021121148W WO2023050025A1 WO 2023050025 A1 WO2023050025 A1 WO 2023050025A1 CN 2021121148 W CN2021121148 W CN 2021121148W WO 2023050025 A1 WO2023050025 A1 WO 2023050025A1
Authority
WO
WIPO (PCT)
Prior art keywords
random access
carrier
access message
control channel
downlink control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2021/121148
Other languages
English (en)
Inventor
Hung Dinh LY
Hwan Joon Kwon
Kexin XIAO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qualcomm Inc
Original Assignee
Qualcomm Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Priority to EP21958624.5A priority Critical patent/EP4410031A4/fr
Priority to US18/579,220 priority patent/US20240324021A1/en
Priority to CN202180102619.1A priority patent/CN117981449A/zh
Priority to PCT/CN2021/121148 priority patent/WO2023050025A1/fr
Publication of WO2023050025A1 publication Critical patent/WO2023050025A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0836—Random access procedures, e.g. with 4-step access with 2-step access

Definitions

  • the apparatus may include a memory and a processor coupled to the memory.
  • the processor may be configured to receive, from a base station, system information for a cell that includes an anchor carrier and one or more other carriers, the system information including an indication of a first other carrier of the one or more other carriers for receiving a downlink control channel scheduling a second random access message, transmit a first random access message for a random access procedure, and receive, in response to the first random access message and via the first other carrier, the downlink control channel scheduling the second random access message.
  • FIG. 2 illustrates an example of a wireless communications system that supports carrier selection for downlink random access messages in accordance with aspects of the present disclosure.
  • the present disclosure provides techniques for indicating one or more carriers of a flexible cell to be used for reception of one or more respective downlink random access messages.
  • the base station may indicate, via system information, a carrier for reception of a downlink control channel scheduling a second random access message.
  • the UE may transmit, to the base station, a first random access message.
  • the UE may monitor for and receive the downlink control channel scheduling the second random access message via the carrier indicated in the system information.
  • a UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client, among other examples.
  • a UE 115 may also include or may be referred to as a personal electronic device such as a cellular phone, a personal digital assistant (PDA) , a tablet computer, a laptop computer, or a personal computer.
  • PDA personal digital assistant
  • the wireless communications system 100 may include base stations 105 or UEs 115 that support simultaneous communications via carriers associated with multiple carrier bandwidths.
  • each served UE 115 may be configured for operating over portions (e.g., a sub-band, a BWP) or all of a carrier bandwidth.
  • Time intervals of a communications resource may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms) ) .
  • Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023) .
  • SFN system frame number
  • Physical channels may be multiplexed on a carrier according to various techniques.
  • a physical control channel and a physical data channel may be multiplexed on a downlink carrier, for example, using one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques.
  • a control region e.g., a control resource set (CORESET)
  • CORESET control resource set
  • a control region for a physical control channel may be defined by a number of symbol periods and may extend across the system bandwidth or a subset of the system bandwidth of the carrier.
  • One or more control regions (e.g., CORESETs) may be configured for a set of the UEs 115.
  • Each base station 105 may provide communication coverage via one or more cells, for example a macro cell, a small cell, a hot spot, or other types of cells, or any combination thereof.
  • the term “cell” may refer to a logical communication entity used for communication with a base station 105 (e.g., over a carrier) and may be associated with an identifier for distinguishing neighboring cells (e.g., a physical cell identifier (PCID) , a virtual cell identifier (VCID) , or others) .
  • a cell may also refer to a geographic coverage area 110 or a portion of a geographic coverage area 110 (e.g., a sector) over which the logical communication entity operates.
  • a macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by the UEs 115 with service subscriptions with the network provider supporting the macro cell.
  • a small cell may be associated with a lower-powered base station 105, as compared with a macro cell, and a small cell may operate in the same or different (e.g., licensed, unlicensed) frequency bands as macro cells.
  • Small cells may provide unrestricted access to the UEs 115 with service subscriptions with the network provider or may provide restricted access to the UEs 115 having an association with the small cell (e.g., the UEs 115 in a closed subscriber group (CSG) , the UEs 115 associated with users in a home or office) .
  • a base station 105 may support one or multiple cells and may also support communications over the one or more cells using one or multiple component carriers.
  • a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT) , enhanced mobile broadband (eMBB) ) that may provide access for different types of devices.
  • protocol types e.g., MTC, narrowband IoT (NB-IoT) , enhanced mobile broadband (eMBB)
  • NB-IoT narrowband IoT
  • eMBB enhanced mobile broadband
  • a UE 115 may also be able to communicate directly with other UEs 115 over a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol) .
  • D2D device-to-device
  • P2P peer-to-peer
  • One or more UEs 115 utilizing D2D communications may be within the geographic coverage area 110 of a base station 105.
  • Other UEs 115 in such a group may be outside the geographic coverage area 110 of a base station 105 or be otherwise unable to receive transmissions from a base station 105.
  • groups of the UEs 115 communicating via D2D communications may utilize a one-to-many (1: M) system in which each UE 115 transmits to every other UE 115 in the group.
  • a base station 105 facilitates the scheduling of resources for D2D communications. In other cases, D2D communications are carried out between the UEs 115 without the involvement of a base station 105.
  • Some of the network devices may include subcomponents such as an access network entity 140, which may be an example of an access node controller (ANC) .
  • Each access network entity 140 may communicate with the UEs 115 through one or more other access network transmission entities 145, which may be referred to as radio heads, smart radio heads, or transmission/reception points (TRPs) .
  • Each access network transmission entity 145 may include one or more antenna panels.
  • various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio heads and ANCs) or consolidated into a single network device (e.g., a base station 105) .
  • FIG. 2 illustrates an example of a wireless communications system 200 that supports carrier selection for downlink random access messages in accordance with aspects of the present disclosure.
  • wireless communications system 200 may implement or be implemented by one or more aspects of wireless communications system 100.
  • wireless communications system 200 may include a UE 115-a and a base station 105-a, which may be examples of a UE 115 and a base station 105 described with reference to FIG. 1.
  • a flexible cell 230 may be different (e.g., may be implemented differently) from a carrier aggregation configuration.
  • a carrier aggregation framework may support communication over a set of carriers in which the network (e.g., base station 105-a) separately configures multiple cells on the set of carriers, and indicates a carrier aggregation configuration to UE 115-a.
  • the network e.g., base station 105-a
  • an uplink carrier may relate to a downlink carrier.
  • random access procedures may be limited to be performed on a primary cell of the configuration.
  • base station 105-a may indicate, via system information 205, a carrier for reception of a downlink control channel (e.g., PDCCH) scheduling a second random access message 215 (e.g., msg2 or msgB) .
  • a downlink control channel e.g., PDCCH
  • UE 115-a may transmit, to base station 105-a, a first random access message 210 (e.g., an uplink random access message) , such as a message 1 (msg1) for four-step random access or a message A (msgA) for two-step random access.
  • UE 115-a may monitor for and receive the downlink control channel (e.g., PDCCH) scheduling the second random access message 215 via the carrier indicated in the system information 205.
  • PDCCH downlink control channel
  • FIG. 3 illustrates an example of a process flow 300 that supports carrier selection for downlink random access messages in accordance with aspects of the present disclosure.
  • process flow 300 may implement or be implemented by one or more aspects of wireless communications system 100 or 200.
  • process flow 300 may be implemented by a base station 105-b and a UE 115-b, which may be examples of a base station 105 and a UE 115 described with reference to FIGs. 1 and 2.
  • the operations may be performed in a different order than the order shown, or the operations performed by UE 115-b and base station 105-b may be performed in different orders or at different times. For example, some operations may also be left out of process flow 300, or other operations may be added to process flow 300. As another example, operations shown as performed in a single instance (e.g., a single transmission) may in some cases be performed as multiple instances (e.g., multiple transmissions) over some duration of time, or multiple transmissions may be combined into a single transmission instance. Although UE 115-b and base station 105-b are shown performing the operations of process flow 300, some aspects of some operations may also be performed by one or more other wireless devices.
  • UE 115-b may use the anchor carrier of the cell to receive the downlink control channel scheduling the second random access message. For example, if the network (e.g., base station 105-b) does not indicate, via the system information, a carrier for receiving the downlink control channel or the second random access message, or both, one or both of these communications (e.g., the communication (s) not indicated in the system information) may be received via the anchor carrier as a default option.
  • base station 105-b may also transmit, to UE 115-b and in response to transmitting the downlink control channel scheduling the second random access message, the second random access message (e.g., msg2) .
  • base station 105-b may transmit the second random access message via the first other carrier, based on transmitting the downlink control channel via the first other carrier.
  • the indication of the first other carrier in the system information may be applicable to both the downlink control channel and the second random access message (e.g., UE 115-b may receive the PDCCH and the PDSCH for msg2 via the same indicated carrier) .
  • base station 105-b may transmit, and UE 115-b may receive, the second random access message via the first other carrier (e.g., based on UE 115-b monitoring the first other carrier for the second random access message) .
  • base station 105-b may transmit, and UE 115-b may receive, the second random access message via the second other carrier (e.g., based on UE 115-b monitoring the second other carrier for the second random access message) .
  • the system information, the downlink control channel, the second random access message, or the second downlink control channel may include an indication of the fourth other carrier whether or not the first other carrier, the second other carrier, or the third other carrier (e.g., or some combination thereof) , are indicated.
  • base station 105-b may not indicate the first other carrier, the second other carrier, or the third other carrier (e.g., or some combination thereof) , but may indicate the fourth other carrier via the system information, the downlink control channel, the second random access message, or the second downlink control channel.
  • base station 105-b may transmit the fourth random access message via the third other carrier of the flexible cell, based on transmitting the second downlink control channel via the third other carrier (e.g., whether or not the downlink control channel is transmitted via the first other carrier or the second random access message is transmitted via the second other carrier) .
  • the fourth random access message may be transmitted via a same carrier as the second downlink control channel.
  • base station 105-b may transmit, and UE 115-b may receive, the fourth random access message via the third other carrier (e.g., based on UE 115-b monitoring the third other carrier for the fourth random access message) .
  • base station 105-b may transmit, and UE 115-b may receive, the fourth random access message via the fifth other carrier (e.g., based on UE 115-b monitoring the fifth other carrier for the fourth random access message) .
  • the system information, the downlink control channel, the second random access message, the second downlink control channel, or the third downlink control channel may include an indication of the fifth other carrier whether or not the first other carrier, the second other carrier, the third other carrier, the fourth other carrier (e.g., or some combination thereof) , are indicated.
  • base station 105-b may not indicate the first other carrier, the second other carrier, the third other carrier, or the fourth other carrier (e.g., or some combination thereof) , but may indicate the fifth other carrier via the system information, the downlink control channel, the second random access message, the second downlink control channel, or the third downlink control channel.
  • the msgA payload (e.g., PUSCH transmission) may include at least similar contents to msg3 from a four-step random access procedure, such as an RRC request, a buffer state report, and so on.
  • the msgA payload may also include data (e.g., data related to the random access procedure) .
  • the msgB may represent a random access response and may be scheduled via a downlink control channel (e.g., PDCCH) and may be transmitted via a downlink shared channel (e.g., PDSCH) .
  • the msgB may include at least similar information to msg2 and msg4 from a four-step random access procedure (e.g., a timing advance, a RNTI, contention resolution information) .
  • the feedback for msgB may be transmitted via an uplink control channel (e.g., a PUCCH) and may include feedback indicating whether msgB was received successfully by UE 115-c. For example, the feedback may include an ACK when msgB is successfully received.
  • base station 105-c may transmit, to UE 115-c, system information for a cell (e.g., a flexible cell) that comprises an anchor carrier and one or more other carriers (e.g., non-anchor carriers) .
  • the system information may include an indication of a first other carrier of the one or more other carriers (e.g., non-anchor carriers) for receiving a downlink control channel (e.g., PDCCH) scheduling a second random access message (e.g., msgB) .
  • the system information may indicate the first other carrier using reserved bits using a dedicated information element, or using an existing information element, among other examples.
  • UE 115-c may transmit, to base station 105-c, a first random access message (e.g., msgA, such as the preamble and the payload for msgA) for a random access procedure (e.g., the two-step random access procedure) .
  • a first random access message e.g., msgA, such as the preamble and the payload for msgA
  • a random access procedure e.g., the two-step random access procedure
  • base station 105-c may also transmit, to UE 115-c and in response to transmitting the downlink control channel scheduling the second random access message, the second random access message (e.g., msgB) .
  • base station 105-c may transmit the second random access message via the first other carrier, based on transmitting the downlink control channel via the first other carrier.
  • the indication of the first other carrier in the system information may be applicable to both the downlink control channel and the second random access message (e.g., UE 115-c may receive the PDCCH and the PDSCH for msgB via the same indicated carrier) .
  • base station 105-c may transmit, and UE 115-c may receive, the second random access message via the first other carrier (e.g., based on UE 115-c monitoring the first other carrier for the second random access message) .
  • the receiver 510 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to carrier selection for downlink random access messages) . Information may be passed on to other components of the device 505.
  • the receiver 510 may utilize a single antenna or a set of multiple antennas.
  • the transmitter 515 may provide a means for transmitting signals generated by other components of the device 505.
  • the transmitter 515 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to carrier selection for downlink random access messages) .
  • the transmitter 515 may be co-located with a receiver 510 in a transceiver module.
  • the transmitter 515 may utilize a single antenna or a set of multiple antennas.
  • the communications manager 520 may support wireless communication at a UE in accordance with examples as disclosed herein.
  • the communications manager 520 may be configured as or otherwise support a means for receiving, from a base station, system information for a cell that includes an anchor carrier and one or more other carriers, the system information including an indication of a first other carrier of the one or more other carriers for receiving a downlink control channel scheduling a second random access message.
  • the communications manager 520 may be configured as or otherwise support a means for transmitting a first random access message for a random access procedure.
  • the communications manager 520 may be configured as or otherwise support a means for receiving, in response to the first random access message and via the first other carrier, the downlink control channel scheduling the second random access message.
  • communications manager 520 may increase available battery power and communication quality at a wireless device (e.g., a UE 115) by supporting an indication of a carrier of a flexible cell for reception of a downlink random access message, which may increase communication quality at the wireless device by providing transmission diversity.
  • the associated increase in communication quality may result in increased link performance and decreased overhead based on receiving the downlink random access message.
  • communications manager 520 may save power and increase battery life at a wireless device (e.g., a UE 115) by strategically increasing a quality of communications at a wireless device (e.g., a UE 115) .
  • the device 605, or various components thereof may be an example of means for performing various aspects of carrier selection for downlink random access messages as described herein.
  • the communications manager 620 may include a carrier indication reception component 625, a random access message transmission component 630, a downlink control channel reception component 635, or any combination thereof.
  • the communications manager 620 may be an example of aspects of a communications manager 520 as described herein.
  • the communications manager 620, or various components thereof may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver 610, the transmitter 615, or both.
  • the communications manager 620 may receive information from the receiver 610, send information to the transmitter 615, or be integrated in combination with the receiver 610, the transmitter 615, or both to receive information, transmit information, or perform various other operations as described herein.
  • the communications manager 620 may support wireless communication at a UE in accordance with examples as disclosed herein.
  • the carrier indication reception component 625 may be configured as or otherwise support a means for receiving, from a base station, system information for a cell that includes an anchor carrier and one or more other carriers, the system information including an indication of a first other carrier of the one or more other carriers for receiving a downlink control channel scheduling a second random access message.
  • the random access message transmission component 630 may be configured as or otherwise support a means for transmitting a first random access message for a random access procedure.
  • the downlink control channel reception component 635 may be configured as or otherwise support a means for receiving, in response to the first random access message and via the first other carrier, the downlink control channel scheduling the second random access message.
  • a processor of a wireless device may increase available battery power and communication quality.
  • the increased communication quality may increase available battery power and throughput (e.g., via implementation of system components described with reference to FIG. 7) compared to other systems and techniques, for example, that do not support an indication of a carrier of a flexible cell for reception of a downlink random access message.
  • the processor of the wireless device may identify one or more aspects of the carrier indicated for the reception of the downlink random access message, which may result in increased communication quality, as well as save power and increase battery life at the wireless device (e.g., by strategically supporting increased transmission diversity) , among other benefits.
  • FIG. 7 shows a block diagram 700 of a communications manager 720 that supports carrier selection for downlink random access messages in accordance with aspects of the present disclosure.
  • the communications manager 720 may be an example of aspects of a communications manager 520, a communications manager 620, or both, as described herein.
  • the communications manager 720, or various components thereof, may be an example of means for performing various aspects of carrier selection for downlink random access messages as described herein.
  • the communications manager 720 may include a carrier indication reception component 725, a random access message transmission component 730, a downlink control channel reception component 735, a random access message reception component 740, or any combination thereof. Each of these components may communicate, directly or indirectly, with one another (e.g., via one or more buses) .
  • the random access message reception component 740 may be configured as or otherwise support a means for receiving the second random access message via the first other carrier based on the indication of the first other carrier in the system information and in response to receiving the downlink control channel scheduling the second random access message.
  • the downlink control channel reception component 735 may be configured as or otherwise support a means for receiving, via the first other carrier, a third downlink control channel scheduling a fourth random access message based on the indication of the first other carrier in the system information. In some examples, the downlink control channel reception component 735 may be configured as or otherwise support a means for receiving, via a second other carrier, a third downlink control channel scheduling a fourth random access message based on receiving the second random access message via the second other carrier.
  • the downlink control channel reception component 735 may be configured as or otherwise support a means for receiving, via a third other carrier, a third downlink control channel scheduling a fourth random access message based on receiving, via the third other carrier, a second downlink control channel scheduling a third random access message.
  • the carrier indication reception component 725 may be configured as or otherwise support a means for receiving an indication of a fourth other carrier for a third downlink control channel scheduling a fourth random access message, where the indication of the fourth other carrier is received via the system information, the downlink control channel, the second random access message, a second downlink control channel scheduling a third random access message, or any combination thereof.
  • the downlink control channel reception component 735 may be configured as or otherwise support a means for receiving, via the fourth other carrier, the third downlink control channel based on the indication of the fourth other carrier.
  • the random access message reception component 740 may be configured as or otherwise support a means for receiving, via a third other carrier, a fourth random access message based on receiving, via the third other carrier, a second downlink control channel scheduling a third random access message. In some examples, the random access message reception component 740 may be configured as or otherwise support a means for receiving, via a fourth other carrier, a fourth random access message based on receiving, via the fourth other carrier, a third downlink control channel scheduling the fourth random access message.
  • the I/O controller 810 may manage input and output signals for the device 805.
  • the I/O controller 810 may also manage peripherals not integrated into the device 805.
  • the I/O controller 810 may represent a physical connection or port to an external peripheral.
  • the I/O controller 810 may utilize an operating system such as or another known operating system.
  • the I/O controller 810 may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device.
  • the I/O controller 810 may be implemented as part of a processor, such as the processor 840.
  • a user may interact with the device 805 via the I/O controller 810 or via hardware components controlled by the I/O controller 810.
  • the device 805 may include a single antenna 825. However, in some other cases, the device 805 may have more than one antenna 825, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.
  • the transceiver 815 may communicate bi-directionally, via the one or more antennas 825, wired, or wireless links as described herein.
  • the transceiver 815 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver.
  • the transceiver 815 may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 825 for transmission, and to demodulate packets received from the one or more antennas 825.
  • the memory 830 may include random access memory (RAM) and read-only memory (ROM) .
  • the memory 830 may store computer-readable, computer-executable code 835 including instructions that, when executed by the processor 840, cause the device 805 to perform various functions described herein.
  • the code 835 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory.
  • the code 835 may not be directly executable by the processor 840 but may cause a computer (e.g., when compiled and executed) to perform functions described herein.
  • the memory 830 may contain, among other things, a basic I/O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.
  • BIOS basic I/O system
  • the processor 840 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) .
  • the processor 840 may be configured to operate a memory array using a memory controller.
  • a memory controller may be integrated into the processor 840.
  • the processor 840 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 830) to cause the device 805 to perform various functions (e.g., functions or tasks supporting carrier selection for downlink random access messages) .
  • the device 805 or a component of the device 805 may include a processor 840 and memory 830 coupled to the processor 840, the processor 840 and memory 830 configured to perform various functions described herein.
  • the communications manager 820 may support wireless communication at a UE in accordance with examples as disclosed herein.
  • the communications manager 820 may be configured as or otherwise support a means for receiving, from a base station, system information for a cell that includes an anchor carrier and one or more other carriers, the system information including an indication of a first other carrier of the one or more other carriers for receiving a downlink control channel scheduling a second random access message.
  • the communications manager 820 may be configured as or otherwise support a means for transmitting a first random access message for a random access procedure.
  • the communications manager 820 may be configured as or otherwise support a means for receiving, in response to the first random access message and via the first other carrier, the downlink control channel scheduling the second random access message.
  • the communications manager 820 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the transceiver 815, the one or more antennas 825, or any combination thereof.
  • the communications manager 820 is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager 820 may be supported by or performed by the processor 840, the memory 830, the code 835, or any combination thereof.
  • the code 835 may include instructions executable by the processor 840 to cause the device 805 to perform various aspects of carrier selection for downlink random access messages as described herein, or the processor 840 and the memory 830 may be otherwise configured to perform or support such operations.
  • the receiver 910 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to carrier selection for downlink random access messages) . Information may be passed on to other components of the device 905.
  • the receiver 910 may utilize a single antenna or a set of multiple antennas.
  • the transmitter 915 may provide a means for transmitting signals generated by other components of the device 905.
  • the transmitter 915 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to carrier selection for downlink random access messages) .
  • the transmitter 915 may be co-located with a receiver 910 in a transceiver module.
  • the transmitter 915 may utilize a single antenna or a set of multiple antennas.
  • the communications manager 920, the receiver 910, the transmitter 915, or various combinations thereof or various components thereof may be examples of means for performing various aspects of carrier selection for downlink random access messages as described herein.
  • the communications manager 920, the receiver 910, the transmitter 915, or various combinations or components thereof may support a method for performing one or more of the functions described herein.
  • the communications manager 920, the receiver 910, the transmitter 915, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry) .
  • the hardware may include a processor, a DSP, an ASIC, an FPGA or other programmable logic device, a discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure.
  • a processor and memory coupled with the processor may be configured to perform one or more of the functions described herein (e.g., by executing, by the processor, instructions stored in the memory) .
  • the communications manager 920, the receiver 910, the transmitter 915, or various combinations or components thereof may be implemented in code (e.g., as communications management software or firmware) executed by a processor. If implemented in code executed by a processor, the functions of the communications manager 920, the receiver 910, the transmitter 915, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting a means for performing the functions described in the present disclosure) .
  • code e.g., as communications management software or firmware
  • the functions of the communications manager 920, the receiver 910, the transmitter 915, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting a means for performing the functions described in the present disclosure)
  • the communications manager 920 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver 910, the transmitter 915, or both.
  • the communications manager 920 may receive information from the receiver 910, send information to the transmitter 915, or be integrated in combination with the receiver 910, the transmitter 915, or both to receive information, transmit information, or perform various other operations as described herein.
  • the communications manager 920 may support wireless communication at a base station in accordance with examples as disclosed herein.
  • the communications manager 920 may be configured as or otherwise support a means for transmitting, to a UE, system information for a cell that includes an anchor carrier and one or more other carriers, the system information including an indication of a first other carrier of the one or more other carriers for transmitting a downlink control channel scheduling a second random access message.
  • the communications manager 920 may be configured as or otherwise support a means for receiving, from the UE, a first random access message for a random access procedure.
  • the communications manager 920 may be configured as or otherwise support a means for transmitting, in response to the first random access message and via the first other carrier, the downlink control channel scheduling the second random access message.
  • FIG. 10 shows a block diagram 1000 of a device 1005 that supports carrier selection for downlink random access messages in accordance with aspects of the present disclosure.
  • the device 1005 may be an example of aspects of a device 905 or a base station 105 as described herein.
  • the device 1005 may include a receiver 1010, a transmitter 1015, and a communications manager 1020.
  • the device 1005 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .
  • the receiver 1010 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to carrier selection for downlink random access messages) . Information may be passed on to other components of the device 1005.
  • the receiver 1010 may utilize a single antenna or a set of multiple antennas.
  • the device 1005, or various components thereof, may be an example of means for performing various aspects of carrier selection for downlink random access messages as described herein.
  • the communications manager 1020 may include a carrier indication transmission component 1025, a random access message reception component 1030, a downlink control channel transmission component 1035, or any combination thereof.
  • the communications manager 1020 may be an example of aspects of a communications manager 920 as described herein.
  • the communications manager 1020, or various components thereof may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver 1010, the transmitter 1015, or both.
  • the communications manager 1020 may receive information from the receiver 1010, send information to the transmitter 1015, or be integrated in combination with the receiver 1010, the transmitter 1015, or both to receive information, transmit information, or perform various other operations as described herein.
  • the communications manager 1020 may support wireless communication at a base station in accordance with examples as disclosed herein.
  • the carrier indication transmission component 1025 may be configured as or otherwise support a means for transmitting, to a UE, system information for a cell that includes an anchor carrier and one or more other carriers, the system information including an indication of a first other carrier of the one or more other carriers for transmitting a downlink control channel scheduling a second random access message.
  • the random access message reception component 1030 may be configured as or otherwise support a means for receiving, from the UE, a first random access message for a random access procedure.
  • the downlink control channel transmission component 1035 may be configured as or otherwise support a means for transmitting, in response to the first random access message and via the first other carrier, the downlink control channel scheduling the second random access message.
  • the communications manager 1120 may support wireless communication at a base station in accordance with examples as disclosed herein.
  • the carrier indication transmission component 1125 may be configured as or otherwise support a means for transmitting, to a UE, system information for a cell that includes an anchor carrier and one or more other carriers, the system information including an indication of a first other carrier of the one or more other carriers for transmitting a downlink control channel scheduling a second random access message.
  • the random access message reception component 1130 may be configured as or otherwise support a means for receiving, from the UE, a first random access message for a random access procedure.
  • the downlink control channel transmission component 1135 may be configured as or otherwise support a means for transmitting, in response to the first random access message and via the first other carrier, the downlink control channel scheduling the second random access message.
  • the random access message transmission component 1140 may be configured as or otherwise support a means for transmitting the second random access message via the first other carrier based on the indication of the first other carrier in the system information and in response to transmitting the downlink control channel scheduling the second random access message.
  • the carrier indication transmission component 1125 may be configured as or otherwise support a means for transmitting, via the system information, an indication of a second other carrier for transmitting the second random access message.
  • the random access message transmission component 1140 may be configured as or otherwise support a means for transmitting the second random access message via the second other carrier based on the indication of the second other carrier in the system information and in response to transmitting the downlink control channel scheduling the second random access message.
  • the carrier indication transmission component 1125 may be configured as or otherwise support a means for transmitting, via the downlink control channel, an indication of a second other carrier for transmitting the second random access message.
  • the random access message transmission component 1140 may be configured as or otherwise support a means for transmitting the second random access message via the second other carrier based on the indication of the second other carrier in the downlink control channel and in response to transmitting the downlink control channel scheduling the second random access message.
  • the downlink control channel transmission component 1135 may be configured as or otherwise support a means for transmitting, via the first other carrier, a third downlink control channel scheduling a fourth random access message based on the indication of the first other carrier in the system information. In some examples, the downlink control channel transmission component 1135 may be configured as or otherwise support a means for transmitting, via a second other carrier, a third downlink control channel scheduling a fourth random access message based on transmitting the second random access message via the second other carrier.
  • the downlink control channel transmission component 1135 may be configured as or otherwise support a means for transmitting, via a third other carrier, a third downlink control channel scheduling a fourth random access message based on transmitting, via the third other carrier, a second downlink control channel scheduling a third random access message.
  • the carrier indication transmission component 1125 may be configured as or otherwise support a means for transmitting an indication of a fourth other carrier for a third downlink control channel scheduling a fourth random access message, where the indication of the fourth other carrier is transmitted via the system information, the downlink control channel, the second random access message, a second downlink control channel scheduling a third random access message, or any combination thereof.
  • the downlink control channel transmission component 1135 may be configured as or otherwise support a means for transmitting, via the fourth other carrier, the third downlink control channel based on the indication of the fourth other carrier.
  • the random access message transmission component 1140 may be configured as or otherwise support a means for transmitting, via the first other carrier, a fourth random access message based on the indication of the first other carrier in the system information. In some examples, the random access message transmission component 1140 may be configured as or otherwise support a means for transmitting, via a second other carrier, a fourth random access message based on transmitting the second random access message via the second other carrier.
  • the transceiver 1215 may be an example of a transmitter 915, a transmitter 1015, a receiver 910, a receiver 1010, or any combination thereof or component thereof, as described herein.
  • the memory 1230 may include RAM and ROM.
  • the memory 1230 may store computer-readable, computer-executable code 1235 including instructions that, when executed by the processor 1240, cause the device 1205 to perform various functions described herein.
  • the code 1235 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory.
  • the code 1235 may not be directly executable by the processor 1240 but may cause a computer (e.g., when compiled and executed) to perform functions described herein.
  • the memory 1230 may contain, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices.
  • the inter-station communications manager 1245 may manage communications with other base stations 105, and may include a controller or scheduler for controlling communications with UEs 115 in cooperation with other base stations 105. For example, the inter-station communications manager 1245 may coordinate scheduling for transmissions to UEs 115 for various interference mitigation techniques such as beamforming or joint transmission. In some examples, the inter-station communications manager 1245 may provide an X2 interface within an LTE/LTE-A wireless communications network technology to provide communication between base stations 105.
  • the communications manager 1220 may support wireless communication at a base station in accordance with examples as disclosed herein.
  • the communications manager 1220 may be configured as or otherwise support a means for transmitting, to a UE, system information for a cell that includes an anchor carrier and one or more other carriers, the system information including an indication of a first other carrier of the one or more other carriers for transmitting a downlink control channel scheduling a second random access message.
  • the communications manager 1220 may be configured as or otherwise support a means for receiving, from the UE, a first random access message for a random access procedure.
  • the communications manager 1220 may be configured as or otherwise support a means for transmitting, in response to the first random access message and via the first other carrier, the downlink control channel scheduling the second random access message.
  • the communications manager 1220 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the transceiver 1215, the one or more antennas 1225, or any combination thereof.
  • the communications manager 1220 is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager 1220 may be supported by or performed by the processor 1240, the memory 1230, the code 1235, or any combination thereof.
  • the code 1235 may include instructions executable by the processor 1240 to cause the device 1205 to perform various aspects of carrier selection for downlink random access messages as described herein, or the processor 1240 and the memory 1230 may be otherwise configured to perform or support such operations.
  • FIG. 13 shows a flowchart illustrating a method 1300 that supports carrier selection for downlink random access messages in accordance with aspects of the present disclosure.
  • the operations of the method 1300 may be implemented by a UE or its components as described herein.
  • the operations of the method 1300 may be performed by a UE 115 as described with reference to FIGs. 1 through 8.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
  • the method may include receiving, from a base station, system information for a cell that includes an anchor carrier and one or more other carriers, the system information including an indication of a first other carrier of the one or more other carriers for receiving a downlink control channel scheduling a second random access message.
  • the operations of 1305 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1305 may be performed by a carrier indication reception component 725 as described with reference to FIG. 7.
  • the method may include transmitting a first random access message for a random access procedure.
  • the operations of 1310 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1310 may be performed by a random access message transmission component 730 as described with reference to FIG. 7.
  • the method may include receiving, in response to the first random access message and via the first other carrier, the downlink control channel scheduling the second random access message.
  • the operations of 1315 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1315 may be performed by a downlink control channel reception component 735 as described with reference to FIG. 7.
  • FIG. 14 shows a flowchart illustrating a method 1400 that supports carrier selection for downlink random access messages in accordance with aspects of the present disclosure.
  • the operations of the method 1400 may be implemented by a UE or its components as described herein.
  • the operations of the method 1400 may be performed by a UE 115 as described with reference to FIGs. 1 through 8.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
  • the method may include receiving, from a base station, system information for a cell that includes an anchor carrier and one or more other carriers, the system information including an indication of a first other carrier of the one or more other carriers for receiving a downlink control channel scheduling a second random access message.
  • the operations of 1405 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1405 may be performed by a carrier indication reception component 725 as described with reference to FIG. 7.
  • the method may include receiving, in response to the first random access message and via the first other carrier, the downlink control channel scheduling the second random access message.
  • the operations of 1415 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1415 may be performed by a downlink control channel reception component 735 as described with reference to FIG. 7.
  • the method may include receiving the second random access message via the first other carrier based on the indication of the first other carrier in the system information and in response to receiving the downlink control channel scheduling the second random access message.
  • the operations of 1420 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1420 may be performed by a random access message reception component 740 as described with reference to FIG. 7.
  • FIG. 15 shows a flowchart illustrating a method 1500 that supports carrier selection for downlink random access messages in accordance with aspects of the present disclosure.
  • the operations of the method 1500 may be implemented by a base station or its components as described herein.
  • the operations of the method 1500 may be performed by a base station 105 as described with reference to FIGs. 1 through 4 and 9 through 12.
  • a base station may execute a set of instructions to control the functional elements of the base station to perform the described functions. Additionally or alternatively, the base station may perform aspects of the described functions using special-purpose hardware.
  • the method may include transmitting, to a UE, system information for a cell that includes an anchor carrier and one or more other carriers, the system information including an indication of a first other carrier of the one or more other carriers for transmitting a downlink control channel scheduling a second random access message.
  • the operations of 1505 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1505 may be performed by a carrier indication transmission component 1125 as described with reference to FIG. 11.
  • the method may include transmitting, in response to the first random access message and via the first other carrier, the downlink control channel scheduling the second random access message.
  • the operations of 1515 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1515 may be performed by a downlink control channel transmission component 1135 as described with reference to FIG. 11.
  • FIG. 16 shows a flowchart illustrating a method 1600 that supports carrier selection for downlink random access messages in accordance with aspects of the present disclosure.
  • the operations of the method 1600 may be implemented by a base station or its components as described herein.
  • the operations of the method 1600 may be performed by a base station 105 as described with reference to FIGs. 1 through 4 and 9 through 12.
  • a base station may execute a set of instructions to control the functional elements of the base station to perform the described functions. Additionally or alternatively, the base station may perform aspects of the described functions using special-purpose hardware.
  • the method may include transmitting, to a UE, system information for a cell that includes an anchor carrier and one or more other carriers, the system information including an indication of a first other carrier of the one or more other carriers for transmitting a downlink control channel scheduling a second random access message.
  • the operations of 1605 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1605 may be performed by a carrier indication transmission component 1125 as described with reference to FIG. 11.
  • the method may include receiving, from the UE, a first random access message for a random access procedure.
  • the operations of 1610 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1610 may be performed by a random access message reception component 1130 as described with reference to FIG. 11.
  • the method may include transmitting, in response to the first random access message and via the first other carrier, the downlink control channel scheduling the second random access message.
  • the operations of 1615 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1615 may be performed by a downlink control channel transmission component 1135 as described with reference to FIG. 11.
  • the method may include transmitting the second random access message via the first other carrier based on the indication of the first other carrier in the system information and in response to transmitting the downlink control channel scheduling the second random access message.
  • the operations of 1620 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1620 may be performed by a random access message transmission component 1140 as described with reference to FIG. 11.
  • a method for wireless communication at a UE comprising: receiving, from a base station, system information for a cell that comprises an anchor carrier and one or more other carriers, the system information comprising an indication of a first other carrier of the one or more other carriers for receiving a downlink control channel scheduling a second random access message; transmitting a first random access message for a random access procedure; and receiving, in response to the first random access message and via the first other carrier, the downlink control channel scheduling the second random access message.
  • Aspect 2 The method of aspect 1, further comprising: receiving the second random access message via the first other carrier based at least in part on the indication of the first other carrier in the system information and in response to receiving the downlink control channel scheduling the second random access message.
  • Aspect 3 The method of aspect 1, further comprising: receiving, via the system information, an indication of a second other carrier for receiving the second random access message; and receiving the second random access message via the second other carrier based at least in part on the indication of the second other carrier in the system information and in response to receiving the downlink control channel scheduling the second random access message.
  • Aspect 4 The method of aspect 1, further comprising: receiving, via the downlink control channel, an indication of a second other carrier for receiving the second random access message; and receiving the second random access message via the second other carrier based at least in part on the indication of the second other carrier in the downlink control channel and in response to receiving the downlink control channel scheduling the second random access message.
  • Aspect 6 The method of any of aspects 1 through 4, further comprising: receiving, via a second other carrier, a second downlink control channel scheduling a third random access message based at least in part on receiving the second random access message via the second other carrier.
  • Aspect 7 The method of any of aspects 1 through 4, further comprising: receiving an indication of a third other carrier for a second downlink control channel scheduling a third random access message, wherein the indication of the third other carrier is received via the system information, the downlink control channel, the second random access message, or any combination thereof; and receiving, via the third other carrier, the second downlink control channel based at least in part on the indication of the third other carrier.
  • Aspect 9 The method of any of aspects 1 through 7, further comprising: receiving, via a second other carrier, a third downlink control channel scheduling a fourth random access message based at least in part on receiving the second random access message via the second other carrier.
  • Aspect 10 The method of any of aspects 1 through 7, further comprising: receiving, via a third other carrier, a third downlink control channel scheduling a fourth random access message based at least in part on receiving, via the third other carrier, a second downlink control channel scheduling a third random access message.
  • Aspect 11 The method of any of aspects 1 through 7, further comprising: receiving an indication of a fourth other carrier for a third downlink control channel scheduling a fourth random access message, wherein the indication of the fourth other carrier is received via the system information, the downlink control channel, the second random access message, a second downlink control channel scheduling a third random access message, or any combination thereof; and receiving, via the fourth other carrier, the third downlink control channel based at least in part on the indication of the fourth other carrier.
  • Aspect 14 The method of any of aspects 1 through 11, further comprising: receiving, via a third other carrier, a fourth random access message based at least in part on receiving, via the third other carrier, a second downlink control channel scheduling a third random access message.
  • Aspect 18 The method of any of aspects 1 through 17, wherein the second random access message is a msg2 and the random access procedure is a four-step random access procedure or the second random access message is a msgB and the random access procedure is a two-step random access procedure.
  • Aspect 21 The method of aspect 19, further comprising: transmitting, via the system information, an indication of a second other carrier for transmitting the second random access message; and transmitting the second random access message via the second other carrier based at least in part on the indication of the second other carrier in the system information and in response to transmitting the downlink control channel scheduling the second random access message.
  • Aspect 22 The method of aspect 19, further comprising: transmitting, via the downlink control channel, an indication of a second other carrier for transmitting the second random access message; and transmitting the second random access message via the second other carrier based at least in part on the indication of the second other carrier in the downlink control channel and in response to transmitting the downlink control channel scheduling the second random access message.
  • Aspect 23 The method of any of aspects 19 through 22, further comprising: transmitting, via the first other carrier, a second downlink control channel scheduling a third random access message based at least in part on the indication of the first other carrier in the system information.
  • Aspect 25 The method of any of aspects 19 through 22, further comprising: transmitting an indication of a third other carrier for a second downlink control channel scheduling a third random access message, wherein the indication of the third other carrier is transmitted via the system information, the downlink control channel, the second random access message, or any combination thereof; and transmitting, via the third other carrier, the second downlink control channel based at least in part on the indication of the third other carrier.
  • Aspect 26 The method of any of aspects 19 through 25, further comprising: transmitting, via the first other carrier, a third downlink control channel scheduling a fourth random access message based at least in part on the indication of the first other carrier in the system information.
  • Aspect 27 The method of any of aspects 19 through 25, further comprising: transmitting, via a second other carrier, a third downlink control channel scheduling a fourth random access message based at least in part on transmitting the second random access message via the second other carrier.
  • Aspect 29 The method of any of aspects 19 through 25, further comprising: transmitting an indication of a fourth other carrier for a third downlink control channel scheduling a fourth random access message, wherein the indication of the fourth other carrier is transmitted via the system information, the downlink control channel, the second random access message, a second downlink control channel scheduling a third random access message, or any combination thereof; and transmitting, via the fourth other carrier, the third downlink control channel based at least in part on the indication of the fourth other carrier.
  • Aspect 30 The method of any of aspects 19 through 29, further comprising: transmitting, via the first other carrier, a fourth random access message based at least in part on the indication of the first other carrier in the system information.
  • Aspect 32 The method of any of aspects 19 through 29, further comprising: transmitting, via a third other carrier, a fourth random access message based at least in part on transmitting, via the third other carrier, a second downlink control channel scheduling a third random access message.
  • Aspect 33 The method of any of aspects 19 through 29, further comprising: transmitting, via a fourth other carrier, a fourth random access message based at least in part on transmitting, via the fourth other carrier, a third downlink control channel scheduling the fourth random access message.
  • Aspect 34 The method of any of aspects 19 through 29, further comprising: transmitting an indication of a fifth other carrier for a fourth random access message, wherein the indication of the fifth other carrier is transmitted via the system information, the downlink control channel, the second random access message, a second downlink control channel scheduling a third random access message, a third downlink control channel scheduling the fourth random access message, or any combination thereof; and transmitting, via the fifth other carrier, the fourth random access message based at least in part on the indication of the fifth other carrier.
  • Aspect 35 The method of any of aspects 19 through 34, wherein the cell comprises a flexible cell that includes a set of non-aggregated carriers, the set of non-aggregated carriers comprising the anchor carrier and the one or more other carriers, and the one or more other carriers comprises one or more non-anchor carriers.
  • Aspect 36 The method of any of aspects 19 through 35, wherein the second random access message is a msg2 and the random access procedure is a four-step random access procedure or the second random access message is a msgB and the random access procedure is a two-step random access procedure.
  • Aspect 37 An apparatus for wireless communication at a UE, comprising: a memory; and a processor, coupled to the memory, and configured to perform a method of any of aspects 1 through 18.
  • Aspect 38 An apparatus for wireless communication at a UE, comprising at least one means for performing a method of any of aspects 1 through 18.
  • Aspect 39 A non-transitory computer-readable medium storing code for wireless communication at a UE, the code comprising instructions executable by a processor to perform a method of any of aspects 1 through 18.
  • Aspect 40 An apparatus for wireless communication at a base station, comprising: a memory; and a processor, coupled to the memory, and configured to cause the apparatus to perform a method of any of aspects 19 through 36.
  • Aspect 41 An apparatus for wireless communication at a base station, comprising at least one means for performing a method of any of aspects 19 through 36.
  • Aspect 42 A non-transitory computer-readable medium storing code for wireless communication at a base station, the code comprising instructions executable by a processor to perform a method of any of aspects 19 through 36.
  • LTE, LTE-A, LTE-A Pro, or NR may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks.
  • the described techniques may be applicable to various other wireless communications systems such as Ultra Mobile Broadband (UMB) , Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, Flash-OFDM, as well as other systems and radio technologies not explicitly mentioned herein.
  • UMB Ultra Mobile Broadband
  • IEEE Institute of Electrical and Electronics Engineers
  • Wi-Fi Institute of Electrical and Electronics Engineers
  • WiMAX IEEE 802.16
  • IEEE 802.20 Flash-OFDM
  • Information and signals described herein may be represented using any of a variety of different technologies and techniques.
  • data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
  • the functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
  • Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer.
  • non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.
  • determining encompasses a wide variety of actions and, therefore, “determining” can include calculating, computing, processing, deriving, investigating, looking up (such as via looking up in a table, a database or another data structure) , ascertaining and the like. Also, “determining” can include receiving (such as receiving information) , accessing (such as accessing data in a memory) and the like. Also, “determining” can include resolving, selecting, choosing, establishing and other such similar actions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Des procédés, des systèmes et des dispositifs de communication sans fil sont décrits pour prendre en charge une indication d'une ou de plusieurs porteuses d'une cellule flexible à utiliser pour la réception d'un ou de plusieurs messages d'accès aléatoire de liaison descendante respectifs. Une station de base peut indiquer, par l'intermédiaire d'informations de système, une porteuse pour la réception d'un canal de commande de liaison descendante programmant un second message d'accès aléatoire. Un équipement utilisateur (UE) peut initier une procédure d'accès aléatoire en transmettant, à la station de base, un premier message d'accès aléatoire. L'UE peut surveiller et recevoir le canal de commande de liaison descendante programmant le second message d'accès aléatoire par l'intermédiaire de la porteuse indiquée dans les informations de système. L'UE peut recevoir le second message d'accès aléatoire par l'intermédiaire de la même porteuse que le canal de commande de liaison descendante associé, ou par l'intermédiaire d'une porteuse différente qui peut être indiquée dans les informations de système ou dans la transmission de canal de commande de liaison descendante.
PCT/CN2021/121148 2021-09-28 2021-09-28 Sélection de porteuse pour des messages d'accès aléatoire de liaison descendante Ceased WO2023050025A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP21958624.5A EP4410031A4 (fr) 2021-09-28 2021-09-28 Sélection de porteuse pour des messages d'accès aléatoire de liaison descendante
US18/579,220 US20240324021A1 (en) 2021-09-28 2021-09-28 Carrier selection for downlink random access messages
CN202180102619.1A CN117981449A (zh) 2021-09-28 2021-09-28 用于下行链路随机接入消息的载波选择
PCT/CN2021/121148 WO2023050025A1 (fr) 2021-09-28 2021-09-28 Sélection de porteuse pour des messages d'accès aléatoire de liaison descendante

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/121148 WO2023050025A1 (fr) 2021-09-28 2021-09-28 Sélection de porteuse pour des messages d'accès aléatoire de liaison descendante

Publications (1)

Publication Number Publication Date
WO2023050025A1 true WO2023050025A1 (fr) 2023-04-06

Family

ID=85780933

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/121148 Ceased WO2023050025A1 (fr) 2021-09-28 2021-09-28 Sélection de porteuse pour des messages d'accès aléatoire de liaison descendante

Country Status (4)

Country Link
US (1) US20240324021A1 (fr)
EP (1) EP4410031A4 (fr)
CN (1) CN117981449A (fr)
WO (1) WO2023050025A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107734670A (zh) * 2016-08-12 2018-02-23 夏普株式会社 执行随机接入的方法、用户设备和基站
EP3364589A2 (fr) * 2017-01-30 2018-08-22 Commsolid GmbH Fonctionnement de multi-porteuses nb-iot flexibles sur des bandes de radiofréquences
US20180249511A1 (en) * 2016-08-12 2018-08-30 Telefonaktiebolaget Lm Ericsson (Publ) Carrier Configuration for Random Access
US20190223212A1 (en) * 2016-08-12 2019-07-18 Sharp Kabushiki Kaisha Method for execution of random access, user equipment, and base station
US20210282181A1 (en) * 2016-08-20 2021-09-09 Lg Electronics Inc. Random access procedure supporting nb-iot

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107734670A (zh) * 2016-08-12 2018-02-23 夏普株式会社 执行随机接入的方法、用户设备和基站
US20180249511A1 (en) * 2016-08-12 2018-08-30 Telefonaktiebolaget Lm Ericsson (Publ) Carrier Configuration for Random Access
US20190223212A1 (en) * 2016-08-12 2019-07-18 Sharp Kabushiki Kaisha Method for execution of random access, user equipment, and base station
US20210282181A1 (en) * 2016-08-20 2021-09-09 Lg Electronics Inc. Random access procedure supporting nb-iot
EP3364589A2 (fr) * 2017-01-30 2018-08-22 Commsolid GmbH Fonctionnement de multi-porteuses nb-iot flexibles sur des bandes de radiofréquences

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4410031A4 *

Also Published As

Publication number Publication date
EP4410031A4 (fr) 2025-06-18
US20240324021A1 (en) 2024-09-26
CN117981449A (zh) 2024-05-03
EP4410031A1 (fr) 2024-08-07

Similar Documents

Publication Publication Date Title
US12414102B2 (en) Techniques for cross-carrier scheduling from a secondary cell to a primary cell
US12004193B2 (en) Intra-device collision handling
WO2021227046A1 (fr) Indication de dormance de cellule secondaire pour planifier de multiples porteuses composantes
US11956717B2 (en) Techniques for selecting an uplink control information reporting mode
EP4214989A1 (fr) Préemption pour des communications en liaison latérale
EP4315684A1 (fr) Techniques de répétition de transmission d'autorisation configurées en liaison montante dans des communications sans fil
US11653384B2 (en) Techniques for indicating coverage enhancement for random access procedures in wireless communications systems
US20250088316A1 (en) Semi-persistent scheduled feedback deferral with carrier switching in uplink carrier aggregation
US11909691B2 (en) On-demand negative acknowledgment resource request
US11910381B2 (en) Multiplexing techniques for uplink transmissions
US12074825B2 (en) Assignment indexes for dynamic feedback
EP4397108B1 (fr) Capacité de traitement d'indices par groupe de coreset
US12317267B2 (en) Generating a feedback codebook
EP4430778A1 (fr) Rapport de rétroaction pour communications de liaison latérale faisant appel à une agrégation de porteuses
WO2023050025A1 (fr) Sélection de porteuse pour des messages d'accès aléatoire de liaison descendante
US12335961B2 (en) Resources for uplink control information multiplexing in an absence of demodulation reference signals
US20230107842A1 (en) Performing carrier switching with fallback control information
US12192779B2 (en) Fast primary cell switching in carrier aggregation
US11832300B2 (en) Techniques for recovering from a random access message failure
US11765765B2 (en) Multiplexing techniques for multiple uplink component carriers
WO2023055576A1 (fr) Réalisation d'une commutation de porteuse avec informations de commande de repli

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21958624

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 18579220

Country of ref document: US

WWE Wipo information: entry into national phase

Ref document number: 202447003070

Country of ref document: IN

WWE Wipo information: entry into national phase

Ref document number: 202180102619.1

Country of ref document: CN

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2021958624

Country of ref document: EP

Effective date: 20240429